We call upon Google to:
; Step 2: The 3 delay slots — these execute inside LD_DESCRIPTOR
，这一点在爱思助手下载最新版本中也有详细论述
* @param low 起始索引。业内人士推荐WPS官方版本下载作为进阶阅读
You look at a region of the image. If all the pixels are roughly the same color (below some threshold), you store the average color for the whole region as a single value. If the pixels vary too much, you split the region into four quadrants and try again.